For veterinary services, PCE; for landscape and horticultural services and all other agricultural services, wages and salaries from BLS. For prior years, receipts from IRS tabulations of business tax returns

Composite price index of wages and salaries per employee from BLS, PCE, farm prices, and PPI's.

1. Source data and estimating methods apply to both the
1972 SIC and 1987 SIC definition of the industries shown in the table. Industry
titles are 1987 SIC titles.

2. Benchmark values are derived from the 1977, 1982,
1987, and 1992 input-output (I-O) accounts. Gross output estimates are prepared
only for industries for which the double-deflation method is used for estimating
real GPO.